Resend requests were not being sent, because the enqueuer failed to signal the sender threads!  Fixed.
Resend requests were not being sent, because the enqueuer failed to signal the sender threads!  Fixed.

brettdh/libcmm,brettdh/libcmm,brettdh/libcmm,brettdh/libcmm,brettdh/libcmm